This is an interesting approach, trying to balance on a middle line. That's good. This way you won't miss both sides. You take every positive thing you can and you hare happy with it, as far as I can see.
What I also see is, that at the end of the day, it all boils down to the same topic God lol.

Maybe you are lying to him. Or I am lying to you all. Hey! It's a possibility after all. :D
I guess, at the end of the day it boils down to what you want to believe. I see no problem with each viewpoint as long as we are not hurting each other. I just wanted to say that the possibility existed.

Science ≠ Reality.
Science merely consists of models to help describing how our world works. Those are very helpful tools, but they are not the reality. They are at best, strongly simplified versions of reality. More often than not, models get falsified and replaced with better models.
Example, from describing the way atoms work:
-Someone postulated that you can't divide atoms into even tinier parts. Turns out he was wrong….
-Niels Bohr postulated some kind off random but also some reasoned stuff about atoms. He was able to describe the character traits of Hydrogen. Turns out his model isn't good enough to describe more complicated atoms… and even gives false/not-accurate results.
-At some point Erwin Schroedinger appeared with his model and you know what happened then.
-...
Science isn't a static thing. Science is dynamic in every aspect. Unfortunately, that's why we can AND cannot rely solely on science.

Slaughterfest2012.wad. The first map makes you get used to it step by step. 2nd map is alright as well, you can find hiding spots at the beginning. Map03 is quite a bit difficult I'd say. If you know how infighting works it might not be too bad. Unfortunately, this map needs patience and some good strategies. If you can carry your BFG into map04 then Map04 shouldn't be too bad. Focus on taking out archviles. Map07 will gradually develop into a fully slaughter map. Map08 again, the starting might be too difficult. It goes on so forth. The meme map15 can be a pain of ass as well lol. The rest is alright. If you can get used to the playstlye, I am sure you will love the later maps, like about map20 to 30. Oh map20 is just classic, really trains you well in rushing and hiding and dodging.

Depends on what type of slaughter.
The first time I encountered slaughterwads I was just amazed by the sheer amount of monsters and therefore destructions you could cause. It was exactly what I was looking for, especially Slaughterfest2011.wad and Slaughterfest2012.wad. Those were really good, fun and challenging slaughterwads in my opinion. Just the massive amount of monsters aaaaand most importantly being put into really unusual, maybe stressful situations which just didn't happen in the original Doom1 and Doom2 levels.
Basically what others already said lol. But I feel like I am kinda drifting towards the middleground though. For example, wads like Chillax are not enjoyable for me, way too much grinding, only enjoyable with Coop or TAS, but TAS is surprisingly difficult too on Chillax…. freaking archviles man :P